CVE-2025-6626: Shortpixel Adaptive Images – Webp, Avif, Cdn, Image Optimization

Medium severity, CVSS 4.4. EPSS: 0.2% chance of exploitation in the next 30 days.

The ShortPixel Adaptive Images – WebP, AVIF, CDN, Image Optimization plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the API URL Setting in all versions up to, and including, 3.10.3 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with administrator-level access, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This only affects multi-site installations and installations where unfiltered_html has been disabled.

Affected products

• Shortpixel Shortpixel Adaptive Images – Webp, Avif, Cdn, Image Optimization: up to and including 3.10.4

Published 2025-08-02. Last modified 2026-06-17.